Distillation: processes – separatory – Water purification only
Patent
1978-06-09
1979-09-18
Bascomb, Jr., Wilbur L.
Distillation: processes, separatory
Water purification only
203 20, 203 26, 203 40, 159 14, 159 24A, 159 27R, 202176, 202197, 202235, 202264, B01D 128, C02B 104
Patent
active
041682114
ABSTRACT:
A vapor compression type distillation unit is provided for distilling brackish water or seawater wherein high heat transfer rates are achieved in a vertical shell and tube type vaporizer while avoiding carry-over normally resulting from excessive foaming and its entrainment of liquid droplets in the vapor. A pool of liquid is maintained at the lower end of the vaporizer to be fed into the tubes with the level of the liquid being relatively low so that most of the length of the tube is filled with a frothy mixture conducive to high heat transfer rates. The mixture of vapor and liquid discharged from the upper ends of the tubes is caused to flow laterally and then downwardly through a downtake passage communicating with the lower end of the vaporizer. A vapor outlet is provided intermediate the ends of the downtake passage in such a manner that the vapor must change its direction of flow, preferably substantially 180.degree., thereby facilitating the removal of droplets, and also slugs and bubbles, by centrifugal action. The incoming feed is preferably released above the body of liquid in such a manner that any gases or vapors contained therein can escape from the feed while the latter is falling downwardly into the body of liquid.
REFERENCES:
patent: 768314 (1904-08-01), Seemen et al.
patent: 2015680 (1935-10-01), Kermer
patent: 2726198 (1955-12-01), Lowman, Jr. et al.
patent: 3000795 (1961-09-01), Goeldner
patent: 3505111 (1970-04-01), Malek
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